Meanwhile, the campaign group formed in the early 1960s by Britain’s most notorious post-war Nazi agitator, John Tyndall, was called the Greater Britain Movement.

Okay, it’s a small gaffe in the grand scheme of things. But it’s emblematic too of just how slack Cameron’s Downing Street ‘chumocracy’ is. It’s the kind of mistake that would never have been made under Blair or Brown (or, indeed, Thatcher).

It reemphasises how Cameron is beatable, but also how Jeremy Corbyn’s team should be much sharper in exploiting these kinds of miscues.

I like Dan Hannan. I rarely agree with him, many of his views are politically toxic, but I respect him. He’s a right-wing Conservative, self-described as coming from the Whig tradition, and he’s an MEP. He was a high profile supporter of the People’s Pledge, the campaign for an In-Out referendum on the EU, and I was its Director. We used to do a little double act banter at fund-raising dinners: he would do the highbrow politics and the Euroscepticism; I would do the lowbrow campaigning and the Europhilia. He wants the UK to leave the EU; I want us to stay a member.

Dan is extremely good company and the most dangerous sort of political opponent there is: he understands your position better than you do and he respects it. He is well read, well prepared and unfailingly polite. If the Trots had done their Trotskyism Dan Hannan style, they’d be running the Labour Party by now.

Because I take Dan seriously, it was with some sadness that I read his reaction to the Charlie Hebdo murders, and I scribble this blog post with considerable trepidation.

He introduces several dichotomies: we are asked to believe that the Charlie massacre was not as an act of holy war but merely a crime; the perpetrators concerned not soldiers, but common criminals, not religious zealots but pathetic figures. And then, rather strangely, he suggests the public policy response to Islamism should be to ignore its stated rationale as mere self-description, and subject it to ridicule. Seriousness or ridicule are his choices.